Discount Brokers vs. Full-Service Brokers Distinguishing Between Growth and Value Stocks

Discount is not Always the Answer

Consider starting out with a full-service broker. They are often best for novice investors who may still need to build confidence and knowledge of the markets. As you become a more sophisticated investor, you can graduate into investing more of your money yourself.
Source: http://www.investopedia.com/articles/00/112100.asp